Extreme Space Weather in Extra-Solar Systems - a Flare Alert Program

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00561924" target="_blank" >RIV/67985815:_____/17:00561924 - isvavai.cz</a>

Výsledek na webu

<a href="https://oh.geof.unizg.hr/images/publications/volumes/vol41-2017/2017CEAB4167H.pdf" target="_blank" >https://oh.geof.unizg.hr/images/publications/volumes/vol41-2017/2017CEAB4167H.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Extreme Space Weather in Extra-Solar Systems - a Flare Alert Program

Popis výsledku v původním jazyce

Highly energetic stellar activity phenomena, such as outbreaks of radiations (flares) and mass expulsions into the helio-/astro-sphere (coronal mass ejections/CMEs), may have a severe impact on the atmospheric evolution of planets. Stellar flare have been studied for decades now and their typical parameters are determined statistically. However, observations of stellar CMEs are rare, yielding only a handful of detections so far. The detection of CMEs on stars demands more observational effort than the detection flares, because the circumstellar environment cannot be spatially resolved like in the Solar System. The most convincing detections up to now were found as Doppler-shifted Balmer line extra-emission/absorption features emerging close to flare events, indicating the rise end ejection of prominence material embedded in the CME core. Dedicated programs aiming for a statistical determination of occurrence rates and the parameters of stellar CMEs are still lacking. Therefore, we propose an innovative and efficient observational approach to search for and characterize CMEs on Sun-like and late-type pre-main sequence and main sequence stars to determine stellar CME parameters and their occurrence rates as a function of stellar spectral type and age, as well as establish a stellar flare/CME association rate, for the first time ever.nn

Název v anglickém jazyce

Extreme Space Weather in Extra-Solar Systems - a Flare Alert Program

Popis výsledku anglicky

Highly energetic stellar activity phenomena, such as outbreaks of radiations (flares) and mass expulsions into the helio-/astro-sphere (coronal mass ejections/CMEs), may have a severe impact on the atmospheric evolution of planets. Stellar flare have been studied for decades now and their typical parameters are determined statistically. However, observations of stellar CMEs are rare, yielding only a handful of detections so far. The detection of CMEs on stars demands more observational effort than the detection flares, because the circumstellar environment cannot be spatially resolved like in the Solar System. The most convincing detections up to now were found as Doppler-shifted Balmer line extra-emission/absorption features emerging close to flare events, indicating the rise end ejection of prominence material embedded in the CME core. Dedicated programs aiming for a statistical determination of occurrence rates and the parameters of stellar CMEs are still lacking. Therefore, we propose an innovative and efficient observational approach to search for and characterize CMEs on Sun-like and late-type pre-main sequence and main sequence stars to determine stellar CME parameters and their occurrence rates as a function of stellar spectral type and age, as well as establish a stellar flare/CME association rate, for the first time ever.nn

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Central European Astrophysical Bulletin

ISSN

1845-8319

e-ISSN

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Svazek periodika

41

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

HR - Chorvatská republika

Počet stran výsledku

12

Strana od-do

67-78

Kód UT WoS článku

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EID výsledku v databázi Scopus

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